Arch file



July 9, 1940.

J. A. GIBSON ARCH FILE Filed Oct. 26, '1959 OR 6/530 BY lNVENT JOSfP/l A.

Patented July 9, 1940 jg U EDYSTATES PATENT OFFICE Anon FILE Joseph A. Gibsonf'Kimball, Nebr." Application October 26, 1939, Serial No. 301,379

' 5 Claims. (01. 129-11 This invention relates to an arch lock binder and has for its principal object the provision of aneat, simple, and highlyefiicient device which can be quickly and easily opened to receive sheets and quickly and easily closed to hold the sheet in place, and which will be self-locking in the closed position so that it cannot be accidently opened.

Other objects and advantages reside in the'detail construction of the-invention,-which is designed for simplicity, economy, and efficiency.

These will become more apparent from the following description. 1 a

In the following detailed description of'the invention reference is had to the accompanying drawing which forms a part hereof. -Like .numerals. referto like parts in all views of the drawing and throughout the description.

In the drawing:

Fig. l is a perspective View illustrating the improved arch lock binder in place on a backing board.

Fig. 2 is a front view of the improved binder.

Fig. 3 is a cross section therethrough, taken on the line 3--3, Fig. 2, illustrating the binder in the closed position.

Fig. 4 is a similar view illustrating the binder in the open position.

Fig. 5 is a plan view of the binder.

The invention is designed for attachment to.

on. Any number of the arch members may be employed. In the standard model there are two such members, as illustrated. 7

Each of the arch members is supported in its concentric position by means of an integral, radial arm I! formed thereon and extending into the shaft l5. The arms I! join, at their one extremity, the arch members I6 in relatively short radius bends I8.

enter receiving sockets -20 in sheet supporting posts 2| fixedly projecting from the plate 12.

The arch members may be swung from their open and closed positions by means of a crank 1 A series of curvated arch The free extremities of the arch members are pointed, as shown at [9, and.

shaft 22 pivotally supported between the angle brackets l4; The crank shaft terminates'to one side of the plate l2 in a finger hold 23. Between the bracket members, the shaft is offset to form a crank portion 24. The crank portion of the crank shaft is held against the arms I! by means of a hooked retaining member 25. The hooked extremity of the retaining member 25 extends beyond the small radius bend [8 of the arch members, as shown. in Fig. 3.

To open the arch members, the crank shaft is rotated so that the crank portion 24 thereof will move downwardly. In moving downwardly, it presses against the retaining member 25, as shown in Fig. 4, to rotate the shaft l5 and swing the arch members open. Tov close the-arch members, the crank shaft is rotated in, the opposite direction to swing the crank portion 24 thereof upwardly. In moving upwardly, the crank portion acts against the arms H to force the arch members IE to their closed position in their sockets 20. When the closed position is reached, the crank portion M is in line in Fig. 3, so that it will be tangentially in line with the opening pressure of the arch members. Any attempt to pull these members open will simply cause them to push against the crank portion 24 without rotating the latter. The device is therefor locked closed.

To release the lock, it is only necessary to 1'0- tate the shaft 22 counterclockwise as viewed in Fig. 3 until it snaps over the bends l8 to the solid line position of Fig. 3. Further movement will open the arch members.

While a specific form of the improvement has been described and illustrated herein, it is desired to be understood that the same may be varied, within the scope of the appended claims, without departing from the spirit of the invention.

Having thus described the invention, what is claimed and desired secured by Letters Patent is:

1. An arch lock binder comprising: a plate.

shaft supported between said bracket members; 66

and. an offset portion on said crank shaft positioned to contact said arch members when said crank shaft is rotated for swinging the arch members to the closed position.

2. An arch lock binder comprising: a plate member; bracket members extending from said plate member; a shaft rotatably supported between said bracket members; arms extending radially outward from said shaft; arcuate arch members joined to said arms at their one extremities and extending in planes at right angles to said shaft; binding posts carried by said plate for receiving the free extremities of said arch mem bers; and a rotatable crank shaft supported between said bracket members and contacting said arms to swing said arch members to the closed position.

3. An arch lock binder comprising: a plate member; bracket members extending from said plate member; a shaft rotatably supported'be tween said bracket members; arms extending radially outward from said shaft; arcuate arch members joined to said arms at their one extremities and extending about said shaft; binding posts carried by said plate for receiving the free extremities of. said arch members; a rotatable crankshaft supported between said bracket members and contacting said arms to swing said arch members to the closed position; and a retaining member extending from said shaft parallel to said arms and riding against the opposite side of said crank shaft so'that reverse rotation of the latter will open said arch members.

4; An arch lock binder comprising: a plate member; bracket members extending from said plate member; a shaft rotatably supported between said bracket members; arms extending radially outward from said shaft; arcuate arch members joined to said arms at their one extremities; binding posts carried by said plate for receiving the free extremities of said arch members; a rotatable crank shaft supported between said bracket members and contacting said arms to swing said arch members to the closed position; a retaining member extending from said shaft parallel to said arms and riding against the opposite side of said crank shaft so that reverse rotation of the latter will open said arch members; and a hooked extremity on said retaining member for limiting the closing movement of said crank shaft.

5. An arch lock binder comprising: a plate member; bracket members extending from said plate member; a shaft rotatably supported between said bracket members; arms extending radially outward'from said shaft; arcuate arch members joined to said arms at their one extremities by short radius bends and extending circumferentially about said shaft; binding posts carried by said plate for receiving the free extremities of. said arch members; a rotatable crank shaft supported between said bracket members and contacting said arms to swing said arch members to the closed position; a retaining member extending from said shaft parallel tosaid arms and riding against the opposite side of said crank shaft so that reverse rotation of the latter will open said arch members; and a hooked extremity on said retaining member for limiting the closing movement of said crank shaft, said hooked extremity being so positioned that said crank shaft can travel past the short radius bends after the arch members have reached their closed position.

JOSEPH A. GIBSON. 

